Description
The FOX® Performance Series 2.0 shock, part number 985-24-243, is a 10.62″ travel, smooth-body Rear shock with an external reservoir, engineered for rear-position applications at 0″-1″ of lift on Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500 HD, GMC Sierra 2500 HD, GMC Sierra 3500 HD trucks covering the model years detailed below.
IMPORTANT: 2026 model year: excludes the Chevrolet Silverado 2500 HD ZR2 and GMC Sierra 2500 HD AT4X trims. This part number covers 0″-1″ of lift only. FOX® offers this same rear-position application at other lift heights under separate part numbers: 985-24-245 (1.5″-3″ of lift). Double-check the lift height above against your build before ordering — these are not interchangeable. This listing is for the rear shock only and is sold individually; it does not include the matching front unit.
This is FOX®’s aluminum-bodied Performance Series 2.0 Reservoir smooth body shock, built to deliver race-proven damping performance in a bolt-on, hassle-free package. The impact-extruded, clear-anodized 6061-T6 aluminum shock body sheds heat faster than a conventional steel-body shock, helping stabilize damping performance on long, rough runs.
The external reservoir increases oil and nitrogen capacity over a standard monotube design, improving heat dissipation and maintaining consistent damping under repeated hard use. The black-anodized reservoir clamp and mounting hardware are CNC-machined from 6061-T6 billet aluminum.
The 10.62″ shaft is 5/8″ hard chrome-plated, heat-treated alloy steel, paired with FOX®’s race-developed high-flow piston and application-specific valving for predictable ride quality across rough terrain. A redundant sealing pack (main seal, wiper seal, scraper seal) protects the internals. Every FOX® Performance Series 2.0 shock is backed by FOX®’s Limited Lifetime Warranty.
- Fitment: Rear position, 0″-1″ of lift — Chevrolet Silverado 2500 HD — 2020-2025, and 2026 (excludes ZR2) — 0″-1″ lift; Chevrolet Silverado 3500 HD — 2020-2026 — 0″-1″ lift; GMC Sierra 2500 HD — 2020-2025, and 2026 (excludes AT4X) — 0″-1″ lift; GMC Sierra 3500 HD — 2020-2026 — 0″-1″ lift
- Impact-extruded, clear-anodized 6061-T6 aluminum shock body dissipates heat faster than steel
- External reservoir increases oil and nitrogen capacity for consistent damping
- Race-developed high-flow piston with application-specific valving
- 5/8″ hard chrome-plated, heat-treated alloy steel shaft
- Redundant sealing pack: main seal, wiper seal, scraper seal
- Backed by FOX®’s Limited Lifetime Warranty
- Sold individually
| Brand | Fox Racing Shox |
| Part Number | 985-24-243 |
| Series | Performance Series 2.0 |
| Position | Rear |
| Travel | 10.62″ |
| Body | 2.0″ impact-extruded 6061-T6 aluminum, clear-anodized |
| Components | Black-anodized, CNC-machined 6061-T6 billet aluminum |
| Shaft | 5/8″ hard chrome-plated, heat-treated alloy steel |
| Piston | Race-developed high-flow piston design |
| Valving | Application-specific valving |
| Seals | Redundant sealing pack: main seal, wiper seal, scraper seal |
| Extended Length | 26.52″ |
| Compressed Length | 15.90″ |
| Top Mount | Eyelet |
| Bottom Mount | Eyelet |
| Warranty | FOX® Limited Lifetime Warranty |
| What’s Included | (1) FOX® Performance Series 2.0 Rear Shock, part number 985-24-243, with billet aluminum reservoir clamp |
Fitment covers rear-position applications at 0″-1″ of lift on the model years and trims listed above. This is the rear shock only, sold individually — see the IMPORTANT note above for the alternate lift-height part numbers on this platform.